Lamkence felldin



PATENT Crrrcs.

LAW'BENCE FELLDIN, OF SAN FRANCISCO, CALIFORNIA.

FIRE-PROOF COMPOUND.

SPECIFICATION forming part of Letters Patent No. 291,176, dated January 1, 1884.

(No specimens To all whom it may concern.-

Be it known that I, LAWRENCE FELLDIN, a subject of the Emperor of Germany, and residing at San Francisco, in the county of 1 San Francisco and State of California, have inj "1 vented a new and useful composition of mat- 7 7 which the following is aspecification. 1 My composition consists of the following- Io namedingredients, combined-inaboutthepro- V 1 portions stated, viz: asbestus, one pound; srfi nlvittisl five r ssulnlunzieaei l, one

one pound; silica, one-half pound; cr udesul- V V 1' 5 phuret of mg 1 y, one pound. The asbestus, sulphur, silica, 'sal-ammoniac, and crude 7 black antimony are first reduced to an impal- V pable powder, and are to be thoroughly incore porated together.

' 2o phate of iron is then reduced to a powder and 1 dissolved in a sufficient quantity of water, and

\ 1 the sulphuric acid is added thereto. I then prepare a mixture of pulverized pipe or fire clay or Iortland cement, to which a small quantity of slaked lime or plaster-of-paris has been added, and of about one hundred pounds of water, and mix the same in a tank or tub of suitable dimensions. The asbestus,

green vitriol, sulphuric acid, sal-ammoniac,

sulphur, silica, and antimony are then added to the pulverized fire-clay and water, and the whole is thoroughly mixed by stirring.

It should here be remarked that the pul pint; s zlgpgn onigg, one-half pound; snlphur,i

The green vitriol or sul-- verized clay, flint, or quartz is used in sutt'i- I n cient quantity to give the desired consistency 1; 7 V or; or body to the compound and adapt it to be m applied with a brush, after the manner of or j dinary oil-paint, and also that pulverized soapstone may be used instead of the asbestus. f l I,

Thisfire-proof compound, when thin, may be applied with a paint-brush or with a White- 1 Wash-brush in the ordinary manner. When I it is very thick, it may be applied with a plasterers float. It is intended moreparticularly for use upon Wooden walls and upon articles made of wood or other combustible material. u I

I am aware that asbestus and silica have I been used heretofore as the ingredient;- of I fire-proof compound; but I am not aware that or all of the ingredients of my composition, i the 7 A proportions stated, have been used together.

Having thus described my invention, what I 7, claim, and desire to secure by Letters Patent,

n testimony that I claim the foregoing I have hereunto set my hand and seal.

LAWRENCE FELLDIN. Witnesses:

.WILMER BRADFORD, JAMES L. KING. 

